21204767460 has 48 divisors (see below), whose sum is σ = 59576037696. Its totient is φ = 5635300992.

The previous prime is 21204767447. The next prime is 21204767473. The reversal of 21204767460 is 6476740212.

It is an interprime number because it is at equal distance from previous prime (21204767447) and next prime (21204767473).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585514 + ... + 620673.

It is an arithmetic number, because the mean of its divisors is an integer number (1241167452).

Almost surely, 2^21204767460 is an apocalyptic number.

21204767460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21204767460 is an abundant number, since it is smaller than the sum of its proper divisors (38371270236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21204767460 is a wasteful number, since it uses less digits than its factorization.

21204767460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206492 (or 1206490 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21204767460 in words is "twenty-one billion, two hundred four million, seven hundred sixty-seven thousand, four hundred sixty".